bjoernager/rust
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Allow #[rustc_builtin_macro = "name"].

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This makes it possible to have both std::panic and core::panic as a
builtin macro, by using different builtin macro names for each.

Also removes SyntaxExtension::is_derive_copy, as the macro name (e.g.
sym::Copy) is now tracked and provides that information directly.
This commit is contained in:
Mara Bos 2021-01-09 16:48:58 +01:00
parent 1f9dc9a182
commit d651fa78ce
5 changed files with 11 additions and 15 deletions
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12
compiler/rustc_expand/src/base.rs
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@ -728,9 +728,7 @@ pub struct SyntaxExtension {
pub edition: Edition,
/// Built-in macros have a couple of special properties like availability
/// in `#[no_implicit_prelude]` modules, so we have to keep this flag.
pub is_builtin: bool,
/// We have to identify macros providing a `Copy` impl early for compatibility reasons.
pub is_derive_copy: bool,
pub builtin_name: Option<Symbol>,
}
impl SyntaxExtension {
@ -758,8 +756,7 @@ impl SyntaxExtension {
deprecation: None,
helper_attrs: Vec::new(),
edition,
is_builtin: false,
is_derive_copy: false,
builtin_name: None,
kind,
}
}
@ -785,7 +782,7 @@ impl SyntaxExtension {
}
}
let is_builtin = sess.contains_name(attrs, sym::rustc_builtin_macro);
let builtin_name = sess.find_by_name(attrs, sym::rustc_builtin_macro).map(|a| a.value_str().unwrap_or(name));
let (stability, const_stability) = attr::find_stability(&sess, attrs, span);
if const_stability.is_some() {
sess.parse_sess
@ -803,8 +800,7 @@ impl SyntaxExtension {
deprecation: attr::find_deprecation(&sess, attrs).map(|(d, _)| d),
helper_attrs,
edition,
is_builtin,
is_derive_copy: is_builtin && name == sym::Copy,
builtin_name,
}
}